body,html{
    height: 100%;
    padding: 0;
    margin: 0;

}
.title_div{
    text-align: center;
    height: 20%;
    display: flex;
    justify-content: center;
}
.core_div{
    display: flex;
    justify-content: center;
}
.form{
    border: 1px solid black;
    padding: 20px;
    border-radius: 20px;
    box-shadow: 10px 10px 10px gray;
}
table td{
    padding: 10px;
}
tr td:first-child{
    text-align: right;
}
.error{
    color: red;
}